Comment on anons brother has some strong opinions
frezik@lemmy.blahaj.zone 2 days agoSome people have some real bad ideas about insulation. No, the air gap in your brick building isn’t good. Air gaps are cheap and easy, not good. They do belong in certain strategic locations, but they can’t compete with the R-value of filling the space with blown fiberglass. Not even close.
Windows, too. The best, most energy efficient window on the market is at least 3 times worse than a few inches of blown fiberglass. Industry marketing has confused customers on that one.
terry_jerry@sh.itjust.works 2 days ago
Yeah, the intuition of wanting air in the cavity is a correct one. it’s just that what we actually want is a vacuum. This creates a thermal gap a d is why cups with vaccum keep shit warm/cold awesomely. We cant, realisticly achieve this so instead we shove shit into the walls to protect or little air gap from being tampered with. Fiber glass works OK, but foams work better.